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Which of the statements about glass are correct?

1. Glass is a super-cooled liquid having infinite viscosity.

2. Violet coloured glass is obtained by adding \[Mn{{O}_{2}}\].

3. Glass is a man-made silicate.

4. Glass is a crystalline substance.

Select the correct answer using the codes given below.

A)  1, 2 and 4                    

B)  2, 3 and 4

C)  1, 2 and 3          

D)         1 and 3